Jul 16 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Introduction
Magnesium is a silvery-white metal that is used as an alloy element for zinc, lead, aluminum, and other non-ferrous alloys. Magnesium alloys are lightweight with high machinability. They are designated using the ASTM and SAE system in which the first part indicates the two main alloying elements in the alloy and the second part represents their percentages.
Magnesium ZC71 is a wrought alloy. The following datasheet gives an overview of magnesium ZC71-T6 alloy.
Chemical Composition
The following table shows the chemical composition of magnesium ZC71-T6 alloy.
|
Element |
Content (%) |
|
Magnesium, Mg |
90-92.5 |
|
Zinc, Zn |
6-7 |
|
Copper, Cu |
1-1.5 |
|
Manganese, Mn |
0.50 -1 |
|
Silicon, Si |
≤ 0.20 |
|
Nickel, Ni |
≤ 0.010 |
|
Remainder |
≤ 0.30 |
Physical Properties
The physical properties of magnesium ZC71-T6 alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
1.83 g/cm³ |
0.0661 lb/in³ |
|
Melting point |
455-635°C |
851-1180°F |
Mechanical Properties
The mechanical properties of magnesium ZC71-T6 alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
360 MPa |
52200 psi |
|
Yield strength (@strain 0.200 %) |
340 MPa |
49300 psi |
|
Elastic modulus |
44.2 GPa |
6410 ksi |
|
Shear modulus |
17.0 GPa |
2470 ksi |
|
Poisson's ratio |
0.3 |
0.3 |
|
Elongation at break |
6% |
6% |
Thermal Properties
The thermal properties of magnesium ZC71-T6 alloy are highlighted in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@0.000-100°C) |
26 µm/m°C |
14.4 µin/in°F |
|
Thermal conductivity |
122 W/mK |
847 BTU in/hr.ft².°F |